docs: def _get_rest_key_parts(cls, attr_key):
          """Get the RestAPI key of this attr, split it and decode part
          :param str attr_key: Attribute key must be in attribute_map.
          :returns: A list of RestAPI part
          :rtype: list
          """
          rest_split_key = _FLATTEN.split(cls._attribute_map[attr_key]['key'])
          return [_decode_attribute_map_key(key_part) for key_part in rest_split_key]